I was thinking, someone should make a motherboard with its 24pin, 8pin, sata ports and usb/frontpanel connections on the underneath of the pcb instead of on top! That way you could just have a few holes in the motherboard tray and then pretty much all the cables could plug in from behind the tray, so all the cables would stay round the back and not obstruct airflow... anyone think this is a good idea lol! I know it would be tricky getting the back panel to close with the 24pin connector plugged in, if you bent the cables a bit it might work in some cases...

Nonsense idea unless you have a very very specific location of a socket AND it wouldnt interfere with mounting on a case that DIDNT have the appropriate hole. That just aint going to work. And servicing it would be a nightmare.

But look at workstation and server class mainboards that have connectors on the EDGE of the mainboard. That's a good move.